Rubber-tire tread.



UNITED STATES PATENT OFFICE.

HARRY L. MGGLAREN, OF RACINE, WISCONSIN, ASSIGNOR TO RACINE RUBBER COM-PANY, OF RACINE, WISCONSIN, A CORPORATION OF WISCONSIN.

RUBBER-TIRE TREAD.

Application filed September 5, 1912.

To all whom it may concern:

Be it known that I, HARRY ll. MCCLAREN, of Racine, in the county ofRacine and State of Wisconsin, have invented certain new and usefulImprovements in Rubber- Tire Treads, of which the following is aspecification.

This invention relates to tires for vehicle wheels and moreparticularly; to the tread of the tire, one of the primary objects ofthe invention being to provide a tire which will have superior roadgripping qualities and will prevent the vehicle from skidding.

The invention will be readily understood from the following descriptionwhen con sidered in connection with the accompanying drawingsillustrating one preferred embodiment thereof.

Referring to the drawings-Figure 1 is a face view of a fragment of atire equipped with my invention; and Fig. 2 is a transverse sectionalview on the line 2 of Fig. 1.

On the drawings, 5 designates generally the casing which is usually abuilt-up structure composed of layers of fabric and rubher, or othersimilar material. The casing, however, may be of any well known or preferred construction and is preferably equipped with the usual. clencherheads 6.

In order to afford a gripping action between the tire and the road toprevent slippage and skidding of the wheels, I have provided the treadportion of the tire with a series of studs arranged in a novel andsuperior manner upon the face of the tread to afford a maximumresistance to slippage and skidding. The individual studs, which arepreferably of elongated or oblong shape having flat outer surfaces, arearranged in a plurality of rows designated on the drawings by referencecharacters 7, 8 and 9, respectively. The studs of the row 7 are arrangedcircumferentially of the tire with their longitudinal axes in alinementas shown. The studs of rows 8 and 9 however, are so arranged that theiraxes are disposed at an angle to the axes of the studs in row 7 and theaxis of each individual stud in rows 8 and 9 is disposed at an angle tothe Specification of Letters Patent.

Patented A11 26,1913.

Serial No. 718,611.

axes of adjacent studs in the same row and disposed at an angle to theaxis also of its companion stud of the other row. This arrangement ofthe studs in the rows afiords a strong gripping action between the tireand the surface of the road and serves to prevent skidding of thewheels. The ends of the individual studs in each row are also disposedin alternation circumferentially of the tire with the ends of the studsin adjacent rows, so that each stud is offset, so to speak, from thestuds of adjacent rows and the joints between the studs of each row aretherefore staggered or arranged in alternation with the joints ofadjacent rows. This arrangement and relative positioning of the studsenables the tire to firmly grip the road surface over which it istraveling and affords a maximum resistance to slippage of the wheels.

It is believed that my invention and many of its attendant advantageswill be understood from the foregoing without further description and itwill be obvious that the size, shape and relative proportions of thevarious parts may be modified without departure from the spirit of theinvention or the sacrifice of any of the material advantages thereof.

I claim:

A tire for vehicle wheels provided with an inner row ofcireumferentially arranged elongated studs having their longitudinalaxes disposed in alinement, and an outer row of elongated studs arrangedupon each side of the said inner row, the longitudinal axes of the studsforming the outer rows being inclined to the longitudinal axes of thestuds forming the inner row and to the axes of the adjacent studsforming the same row, and the corresponding studs upon the said outerrows being arranged in pairs with their longitudinal axes inclined oneto the other each stud of the inner rows having its ends disposedbetween adjacent pairs of studs forming the outer rows.

HARRY L. MQCLAREN.

Witnesses:

MARTIN J. SELLERs, GUY lV. MORGAN.

Gopies of this patent may be obtained for five cents each, by addressingthe Commissioner of Iatcnts, Washington, D. G.

